Hello all,
Sorry for such a simple request but I can't seem to get mkraid to work.
I want to mirror (RAID-1) two 4.2 GB SCSI drives (/dev/sda, /dev/sdb).
Distribution: Redhat 5.2 (Linux 2.0.36)
Software....: RAIDTools 0.50 BETA 10
The Multiple Devices Driver Support is enabled in the kernel with all
sub-options enabled as well (linear, RAID-0, RAID-1, RAID-4, and RAID-5).
The two SCSI disks are laid out identically:
Disk /dev/sda: 132 heads, 62 sectors, 1017 cylinders
Units = cylinders of 8184 * 512 bytes
Device Boot Start End Blocks Id System
/dev/sda1 1 26 106361 83 Linux native # /
/dev/sda2 27 59 135036 82 Linux swap # swap
/dev/sda3 60 1017 3920136 5 Extended
/dev/sda5 60 92 135005 83 Linux native # /tmp
/dev/sda6 93 143 208661 83 Linux native # /var
/dev/sda7 144 331 769265 83 Linux native # /usr
/dev/sda8 332 582 1027061 83 Linux native # /opt
/dev/sda9 583 1017 1779989 83 Linux native # /home
Disk /dev/sdb: 132 heads, 62 sectors, 1017 cylinders
Units = cylinders of 8184 * 512 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 26 106361 83 Linux native # /
/dev/sdb2 27 59 135036 82 Linux swap # swap
/dev/sdb3 60 1017 3920136 5 Extended
/dev/sdb5 60 92 135005 83 Linux native # /tmp
/dev/sdb6 93 143 208661 83 Linux native # /var
/dev/sdb7 144 331 769265 83 Linux native # /usr
/dev/sdb8 332 582 1027061 83 Linux native # /opt
/dev/sdb9 583 1017 1779989 83 Linux native # /home
I want to mirror the following way:
/dev/sda1 => /dev/sdb1
/dev/sda5 => /dev/sdb5
/dev/sda6 => /dev/sdb6
/dev/sda7 => /dev/sdb7
/dev/sda8 => /dev/sdb8
/dev/sda9 => /dev/sdb9
This assumes that /dev/sda2 (swap) and /dev/sda3 (extended partition) do
not need to be mirrored.
Here is the /etc/raidtab I have setup:
-------------------------------- /etc/raidtab -----------------------------
# raid-1 configuration for /
raiddev /dev/md1
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
device /dev/sda1
raid-disk 0
device /dev/sdb1
raid-disk 1
# raid-1 configuration for /tmp
raiddev /dev/md5
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
device /dev/sda5
raid-disk 0
device /dev/sdb5
raid-disk 1
# raid-1 configuration for /var
raiddev /dev/md6
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
device /dev/sda6
raid-disk 0
device /dev/sdb6
raid-disk 1
# raid-1 configuration for /usr
raiddev /dev/md7
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
device /dev/sda7
raid-disk 0
device /dev/sdb7
raid-disk 1
# raid-1 configuration for /opt
raiddev /dev/md8
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
device /dev/sda8
raid-disk 0
device /dev/sdb8
raid-disk 1
# raid-1 configuration for /home
raiddev /dev/md9
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
device /dev/sda9
raid-disk 0
device /dev/sdb9
raid-disk 1
---------------------------------------------------------------------------
This is the /etc/mdtab file:
---------------------------------------------------------------------------
/dev/md1 RAID1 /dev/sda1 /dev/sdb1 # /
/dev/md5 RAID1 /dev/sda5 /dev/sdb5 # /tmp
/dev/md6 RAID1 /dev/sda6 /dev/sdb6 # /var
/dev/md7 RAID1 /dev/sda7 /dev/sdb7 # /usr
/dev/md8 RAID1 /dev/sda8 /dev/sdb8 # /opt
/dev/md9 RAID1 /dev/sda9 /dev/sdb9 # /home
---------------------------------------------------------------------------
We used the following command unsuccessfully:
mkraid /etc/raidtab
mkraid -c /etc/raidtab
mkraid
mkraid -f
The response we get from each of these commands is:
Nothing to do.
We have also read through the available documentation (FAQ, HOWTO, manpage,
README, etc) to no avail. Can someone give us some advice?
Thanks gang,
Paul B. Brown
Principle Operations Support Engi-weenie
PSINet, Inc.
[EMAIL PROTECTED]
703/375-1894
